🏷️ Basic Information

Make:

Audi

Model:

TT

Year:

1999

Generation:

First Generation (Mk1)

Chassis Code:

8N

Market Segment:

Sports Car / Compact Sports Car

👋 Introduction

Vehicle Positioning:

The Audi TT Mk1 was positioned as a stylish, compact, front-wheel-drive or all-wheel-drive sports coupe/roadster, blending performance with unique design.

Key Competitors 1999:

Porsche Boxster, BMW Z3, Mercedes-Benz SLK, Toyota MR2, Nissan 300ZX.

Design Philosophy:

The TT's design was heavily influenced by Bauhaus principles, emphasizing simplicity, form, and function, characterized by its rounded, 'bubble' silhouette and distinctive spherical lines.

Value Proposition:

Provides essential, detailed electrical repair and diagnostic information for owners and technicians, enabling self-sufficiency in maintaining and repairing the vehicle's complex electrical systems.

Accessibility:

Instant digital download format ensures immediate access without shipping delays or physical storage concerns.

📋 Manual Details

Primary Focus:

Electrical Systems

Secondary Focus:

Component Repair and Maintenance

Estimated Page Count:

Varies by edition, typically 1000+ pages for comprehensive electrical manuals.

Manual Type:

Workshop Service Repair Manual

Language:

English

File Format:

PDF

Digital Delivery:

Instant Download

📖 Manual Coverage

Battery Starter Generator Cruise Control:

Detailed diagnostics and repair procedures for the charging system, starting system, and cruise control operation.

Windshield Wiper Washer System:

Coverage of wiper motors, linkages, washer pumps, fluid reservoirs, and controls.

Exterior Lights Switches:

Includes headlights, taillights, turn signals, brake lights, fog lights, and associated switches (e.g., headlight switch, turn signal stalk).

Interior Lights Switches:

Covers dome lights, vanity lights, door courtesy lights, glove compartment light, and related switches.

Wiring Harnesses:

Extensive coverage of wiring diagrams, troubleshooting faulty circuits, wire routing, connector identification, and repair techniques.

Lighting Control Modules:

Information on any specific modules controlling lighting functions.

Instrument Cluster And Gauges:

Diagnostics and repair for speedometer, tachometer, fuel gauge, coolant temperature gauge, warning lights, and illumination.

Audio System Wiring:

Wiring schematics for factory and optional audio systems, including speaker connections and head unit integration.

Climate Control Electrical Components:

Wiring for HVAC blower motors, control modules, sensors, and actuators.

Power Windows Locks Mirrors:

Electrical troubleshooting for window regulators, door lock actuators, central locking systems, and power mirror adjustments.

Airbag System Wiring:

Wiring for SRS components, including airbags, seatbelt pretensioners, impact sensors, and control modules.

ECU And Sensor Wiring:

Diagrams and troubleshooting for Engine Control Unit (ECU) and various sensor connections.

Troubleshooting Methodology:

Systematic diagnostic procedures for identifying and resolving electrical faults.

Wiring Diagram Interpretation:

Guidance on reading and understanding complex electrical schematics.

Component Testing:

Instructions for testing the functionality of electrical components using multimeters and other diagnostic tools.

Wiring Repair Techniques:

Methods for repairing damaged wires, crimping connectors, and soldering.

Fuse And Relay Identification:

Location and function of all fuses and relays within the vehicle's electrical system.

Module Replacement And Coding:

While primarily electrical, may touch on procedures for replacing certain control modules.

Depth Of Coverage:

Comprehensive, focusing on diagnosis and repair of electrical systems.

Diagnostic Tools Required:

Requires a multimeter, test light, and potentially specialized scan tools for advanced diagnostics (though manual may not explicitly list scan tool procedures).

📊 Manual Specifications

File Format:

PDF

Print Quality:

Full Printable

Zoom Functionality:

YES (Zoom IN/OUT)

Binding Type:

Digital (No physical binding)

Paper Type:

Not Applicable (Digital)

PDF Reader:

Adobe PDF Reader

Compression Software:

WinZip (for initial download, if compressed)

Operating Systems:

All Versions of Windows & Mac

⚙️ Engine Specifications

Engine Code And Type:

1.8T (APX/AUM/AUQ depending on market and configuration). Typically a 1.8-liter turbocharged inline-4 cylinder engine.

Horsepower 1999:

Approximately 180 PS (177 bhp; 132 kW) for the standard 1.8T. Some early European models or specific tunings might differ slightly.

Torque 1999:

Around 235 Nm (173 lb-ft) for the 180 PS version.

Fuel Delivery:

Multi-point Fuel Injection (MPI) with Electronic Throttle Control (ETC).

Fuel Type:

Unleaded Gasoline (Premium/Super Unleaded recommended, typically 95 RON or higher).

Ignition Type:

Distributorless Ignition System (DIS) with individual coil packs per cylinder.

🔧 Transmission

Transmission Type Standard:

5-speed Manual Transmission (FWD models).

Transmission Type Optional:

6-speed Manual Transmission (Quattro AWD models) or 6-speed Tiptronic Automatic (Quattro AWD models).

All Wheel Drive:

Quattro permanent all-wheel drive system was available on certain configurations, featuring a Haldex clutch for front-biased power distribution.

📐 Dimensions

Length:

Approx. 4,041 mm (159.1 in)

Width:

Approx. 1,775 mm (69.9 in)

Height:

Approx. 1,344 mm (52.9 in)

Wheelbase:

Approx. 2,429 mm (95.6 in)

Trunk Volume:

Approx. 180 Liters (6.4 cu ft)

Curb Weight FWD:

Approx. 1,245 kg (2,745 lbs)

Curb Weight Quattro:

Approx. 1,370 kg (3,020 lbs)

🛡️ Safety Features

NHTSA Rating 1999:

Not specifically rated for the 1999 model year by NHTSA in a comparable format to modern standards. Early reviews highlighted good structural integrity but noted some issues with occupant protection in specific scenarios.

Braking System:

Anti-lock Braking System (ABS) standard. Some models may have Electronic Brake-force Distribution (EBD).

Traction Control:

Electronic Stability Program (ESP) was often available as an option on later Mk1 models, but less common on the initial 1999 release, though traction control (ASR) could be present.

Airbags:

Driver and front passenger airbags standard. Side airbags were optional.

Body Structure:

Reinforced passenger cell, crumple zones, and side impact protection beams.

💡 Technology Features

Audio System:

Factory AM/FM radio with CD player. Audi Symphony and Concert systems were available, often with premium sound options.

Navigation:

Optional factory navigation system available on some models, typically a European system with CD-ROM maps.

Cruise Control:

Standard cruise control system, covered in the manual.

Phone Integration:

Optional provisions for hands-free mobile phone integration (e.g., Bluetooth or cradle systems) were sometimes available.

🔧 Maintenance

Oil Change Interval:

Typically every 15,000 km (9,300 miles) or 1 year, whichever comes first, with synthetic oil. However, Audi's 'Longlife' servicing could extend this based on driving conditions, often requiring specific oil specifications.

Timing Belt Replacement:

For the 1.8T engine, the timing belt should be replaced every 90,000 - 120,000 km (56,000 - 75,000 miles) or 5 years, as it is a critical maintenance item. The manual would detail the exact procedure and associated components (tensioners, idlers, water pump).

Engine Oil Type:

Full Synthetic SAE 5W-40 or 0W-40, meeting VW 502 00 specification. Consult manual for exact spec.

Coolant Type:

G12 or G12+ (VW TL 774 C or F), a pink/red OAT-based coolant.

Brake Fluid Type:

DOT 4.

Coil Pack Failure:

The 1.8T engine is known for occasional ignition coil pack failures, leading to misfires and rough running. The manual will detail testing procedures.

ABS Sensor Issues:

ABS wheel speed sensors can fail, causing ABS and ESP/ASR warning lights to illuminate. The manual covers diagnosis.

Oil Consumption:

Some 1.8T engines may exhibit moderate oil consumption, especially at higher mileage. Regular checks are advised.

📚 Vehicle History

Audi Heritage:

Audi, part of the Volkswagen Group, has a long history of automotive engineering and innovation, dating back to the early 20th century with its origins in Auto Union.

Tt Concept Origin:

The TT concept was first shown as a coupe in 1995 and a roadster in 1997, with its radical design drawing significant positive attention.

Tt Mk1 Production Start:

Production of the first-generation TT (Mk1) began in 1998 for the 1999 model year in Europe and later for North America.

Manufacturing Location:

Györ, Hungary (for most models).

🏆 Awards & Recognition

Car And Driver Best:

Car and Driver recognized the Audi TT in its '10Best' list for 2000, praising its styling and performance.

Ward'S Auto World Awards:

The 1.8T engine was a multiple winner of Ward's 10 Best Engines award for its class and performance.

Design Awards:

The Audi TT received numerous design accolades worldwide for its groundbreaking aesthetic.